Letter opener



FIG. 1 is a perspective view of the letter opener showing my new design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a front elevation view thereof

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a top elevation view thereof; and,

FIG. 7 is a bottom view thereof. 

I claim the ornamental design for a letter opener, as shown. 